1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /* ␊ |
25 | * Mach Operating System␊ |
26 | * Copyright (c) 1990 Carnegie-Mellon University␊ |
27 | * Copyright (c) 1989 Carnegie-Mellon University␊ |
28 | * Copyright (c) 1988 Carnegie-Mellon University␊ |
29 | * Copyright (c) 1987 Carnegie-Mellon University␊ |
30 | * All rights reserved. The CMU software License Agreement specifies␊ |
31 | * the terms and conditions for use and redistribution.␊ |
32 | *␊ |
33 | */␊ |
34 | /*␊ |
35 | * HISTORY␊ |
36 | * Revision 2.3 88/08/08 13:47:07 rvb␊ |
37 | * Allocate buffers dynamically vs statically.␊ |
38 | * Now b[i] and i_fs and i_buf, are allocated dynamically.␊ |
39 | * boot_calloc(size) allocates and zeros a buffer rounded to a NPG␊ |
40 | * boundary.␊ |
41 | * Generalize boot spec to allow, xx()/mach, xx(n,[a..h])/mach,␊ |
42 | * xx([a..h])/mach, ...␊ |
43 | * Also default "xx" if unspecified and alloc just "/mach",␊ |
44 | * where everything is defaulted␊ |
45 | * Add routine, ptol(), to parse partition letters.␊ |
46 | *␊ |
47 | */␊ |
48 | ␊ |
49 | /*␊ |
50 | * Copyright (c) 1982, 1986 Regents of the University of California.␊ |
51 | * All rights reserved. The Berkeley software License Agreement␊ |
52 | * specifies the terms and conditions for redistribution.␊ |
53 | *␊ |
54 | *␉@(#)sys.c␉7.1 (Berkeley) 6/5/86␊ |
55 | */␊ |
56 | ␊ |
57 | /* Copyright 2007 VMware Inc.␊ |
58 | "Preboot" ramdisk support added by David Elliott␊ |
59 | */␊ |
60 | ␊ |
61 | #include <AvailabilityMacros.h>␊ |
62 | ␊ |
63 | #include "libsaio.h"␊ |
64 | #include "bootstruct.h"␊ |
65 | #include "platform.h"␊ |
66 | #include "disk.h"␊ |
67 | #include "modules.h"␊ |
68 | #include "xml.h"␊ |
69 | # include "md5.h"␊ |
70 | #include <uuid/uuid.h>␊ |
71 | #if 0 /* No OS X release has ever included this. */␊ |
72 | #include <Kernel/uuid/namespace.h>␊ |
73 | #else␊ |
74 | /* copied from uuid/namespace.h, just like BootX's fs.c does. */␊ |
75 | UUID_DEFINE( kFSUUIDNamespaceSHA1, 0xB3, 0xE2, 0x0F, 0x39, 0xF2, 0x92, 0x11, 0xD6, 0x97, 0xA4, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC );␊ |
76 | #endif␊ |
77 | ␊ |
78 | #if UNUSED␊ |
79 | extern int multiboot_partition;␊ |
80 | extern int multiboot_partition_set;␊ |
81 | #endif␊ |
82 | ␊ |
83 | struct devsw {␊ |
84 | const char * name;␊ |
85 | // size increased from char to short to handle non-BIOS internal devices␊ |
86 | unsigned short biosdev;␊ |
87 | int type;␊ |
88 | };␊ |
89 | ␊ |
90 | // Device entries must be ordered by bios device numbers. ␊ |
91 | static struct devsw devsw[] =␊ |
92 | {␊ |
93 | { "hd", 0x80, kBIOSDevTypeHardDrive }, /* DEV_HD */␊ |
94 | { "en", 0xE0, kBIOSDevTypeNetwork }, /* DEV_EN */␊ |
95 | { "rd", 0x100, kBIOSDevTypeHardDrive },␊ |
96 | { "bt", 0x101, kBIOSDevTypeHardDrive }, // turbo - type for booter partition␊ |
97 | { 0, 0 }␊ |
98 | };␊ |
99 | ␊ |
100 | // Pseudo BIOS devices␊ |
101 | enum {␊ |
102 | ␉kPseudoBIOSDevRAMDisk = 0x100,␊ |
103 | ␉kPseudoBIOSDevBooter = 0x101␊ |
104 | };␊ |
105 | ␊ |
106 | /*␊ |
107 | * Max number of file descriptors.␊ |
108 | */␊ |
109 | #define NFILES 6␊ |
110 | ␊ |
111 | static struct iob iob[NFILES];␊ |
112 | ␊ |
113 | void * gFSLoadAddress = 0;␊ |
114 | ␊ |
115 | // Turbo - save what we think is our original BIOS boot volume if we have one 0xab␊ |
116 | BVRef gBIOSBootVolume = NULL;␊ |
117 | BVRef gBootVolume;␊ |
118 | ␊ |
119 | static BVRef newBootVolumeRef( int biosdev, int partno );␊ |
120 | static int GetFreeFd(void);␊ |
121 | static struct iob * iob_from_fdesc(int fdesc);␊ |
122 | #if UNUSED␊ |
123 | static int open_bvr(BVRef bvr, const char *filePath, int flags);␊ |
124 | #else␊ |
125 | static int open_bvr(BVRef bvr, const char *filePath);␊ |
126 | #endif␊ |
127 | ␊ |
128 | //==========================================================================␊ |
129 | // LoadVolumeFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
130 | // Load the specified file from the specified volume␊ |
131 | // to the load buffer at LOAD_ADDR.␊ |
132 | // If the file is fat, load only the i386 portion.␊ |
133 | ␊ |
134 | long LoadVolumeFile(BVRef bvr, const char *filePath)␊ |
135 | {␊ |
136 | long fileSize;␊ |
137 | ␉␊ |
138 | // Read file into load buffer. The data in the load buffer will be␊ |
139 | // overwritten by the next LoadFile() call.␊ |
140 | ␉␊ |
141 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
142 | ␉␊ |
143 | fileSize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
144 | ␉␊ |
145 | // Return the size of the file, or -1 if load failed.␊ |
146 | ␉␊ |
147 | return fileSize;␊ |
148 | }␊ |
149 | ␊ |
150 | //==========================================================================␊ |
151 | // LoadFile - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
152 | // Load the specified file to the load buffer at LOAD_ADDR.␊ |
153 | // If the file is fat, load only the i386 portion.␊ |
154 | ␊ |
155 | long LoadFile(const char * fileSpec)␊ |
156 | {␊ |
157 | const char * filePath;␊ |
158 | BVRef bvr;␊ |
159 | ␉␊ |
160 | // Resolve the boot volume from the file spec.␊ |
161 | ␉␊ |
162 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
163 | return -1;␊ |
164 | ␉␊ |
165 | return LoadVolumeFile(bvr, filePath);␊ |
166 | }␊ |
167 | ␊ |
168 | long ReadFileAtOffset(const char * fileSpec, void *buffer, uint64_t offset, uint64_t length)␊ |
169 | {␊ |
170 | const char *filePath;␊ |
171 | BVRef bvr;␊ |
172 | ␉␊ |
173 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
174 | return -1;␊ |
175 | ␉␊ |
176 | if (bvr->fs_readfile == NULL)␊ |
177 | return -1;␊ |
178 | ␉␊ |
179 | return bvr->fs_readfile(bvr, (char *)filePath, buffer, offset, length);␊ |
180 | }␊ |
181 | ␊ |
182 | long LoadThinFatFile(const char *fileSpec, void **binary)␊ |
183 | {␊ |
184 | const char *filePath;␊ |
185 | FSReadFile readFile;␊ |
186 | BVRef bvr;␊ |
187 | unsigned long length/*, length2*/; ␊ |
188 | ␉long length2;␊ |
189 | ␉␊ |
190 | // Resolve the boot volume from the file spec.␊ |
191 | ␉␊ |
192 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL)␊ |
193 | return -1;␊ |
194 | ␉␊ |
195 | *binary = (void *)kLoadAddr;␊ |
196 | ␉␊ |
197 | // Read file into load buffer. The data in the load buffer will be␊ |
198 | // overwritten by the next LoadFile() call.␊ |
199 | ␉␊ |
200 | gFSLoadAddress = (void *) LOAD_ADDR;␊ |
201 | ␉␊ |
202 | readFile = bvr->fs_readfile;␊ |
203 | ␉␊ |
204 | if (readFile != NULL) {␊ |
205 | // Read the first 4096 bytes (fat header)␊ |
206 | length = readFile(bvr, (char *)filePath, *binary, 0, 0x1000);␊ |
207 | if (length > 0) {␊ |
208 | if (ThinFatFile(binary, &length) == 0) {␊ |
209 | ␉␉␉␉if (length == 0)␊ |
210 | ␉␉␉␉␉return 0;␊ |
211 | // We found a fat binary; read only the thin part␊ |
212 | length = readFile(bvr, (char *)filePath,␊ |
213 | (void *)kLoadAddr, (unsigned long)(*binary) - kLoadAddr, length);␊ |
214 | *binary = (void *)kLoadAddr;␊ |
215 | } else {␊ |
216 | // Not a fat binary; read the rest of the file␊ |
217 | length2 = readFile(bvr, (char *)filePath, (void *)(kLoadAddr + length), length, 0);␊ |
218 | //if (length2 == -1) return -1;␊ |
219 | ␉␉␉␉if (length2 < 0) return -1;␊ |
220 | ␉␉␉␉␊ |
221 | length += (unsigned long)length2;␊ |
222 | }␊ |
223 | }␊ |
224 | } else {␊ |
225 | length = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
226 | if (length > 0) {␊ |
227 | ThinFatFile(binary, &length);␊ |
228 | }␊ |
229 | }␊ |
230 | ␉␊ |
231 | return length;␊ |
232 | }␊ |
233 | ␊ |
234 | // filesystem-specific getUUID functions call this shared string generator␊ |
235 | long CreateUUIDString(uint8_t uubytes[], int nbytes, char *uuidStr)␊ |
236 | {␊ |
237 | unsigned fmtbase, fmtidx, i;␊ |
238 | uint8_t uuidfmt[] = { 4, 2, 2, 2, 6 };␊ |
239 | char *p = uuidStr;␊ |
240 | MD5_CTX md5c;␊ |
241 | uint8_t mdresult[16];␊ |
242 | ␉␊ |
243 | bzero(mdresult, sizeof(mdresult));␊ |
244 | ␉␊ |
245 | // just like AppleFileSystemDriver␊ |
246 | MD5Init(&md5c);␊ |
247 | MD5Update(&md5c, kFSUUIDNamespaceSHA1, sizeof(kFSUUIDNamespaceSHA1));␊ |
248 | MD5Update(&md5c, uubytes, nbytes);␊ |
249 | MD5Final(mdresult, &md5c);␊ |
250 | ␉␊ |
251 | // this UUID has been made version 3 style (i.e. via namespace)␊ |
252 | // see "-uuid-urn-" IETF draft (which otherwise copies byte for byte)␊ |
253 | mdresult[6] = 0x30 | ( mdresult[6] & 0x0F );␊ |
254 | mdresult[8] = 0x80 | ( mdresult[8] & 0x3F );␊ |
255 | ␉␊ |
256 | ␉␊ |
257 | // generate the text: e.g. 5EB1869F-C4FA-3502-BDEB-3B8ED5D87292␊ |
258 | fmtbase = 0;␊ |
259 | for(fmtidx = 0; fmtidx < sizeof(uuidfmt); fmtidx++) {␊ |
260 | for(i=0; i < uuidfmt[fmtidx]; i++) {␊ |
261 | uint8_t byte = mdresult[fmtbase+i];␊ |
262 | char nib;␊ |
263 | ␉␉␉␊ |
264 | nib = byte >> 4;␊ |
265 | *p = nib + '0'; // 0x4 -> '4'␊ |
266 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
267 | p++;␊ |
268 | ␉␉␉␊ |
269 | nib = byte & 0xf;␊ |
270 | *p = nib + '0'; // 0x4 -> '4'␊ |
271 | if(*p > '9') *p = (nib - 9 + ('A'-1)); // 0xB -> 'B'␊ |
272 | p++;␊ |
273 | ␉␉␉␊ |
274 | }␊ |
275 | fmtbase += i;␊ |
276 | if(fmtidx < sizeof(uuidfmt)-1)␊ |
277 | *(p++) = '-';␊ |
278 | else␊ |
279 | *p = '\0';␊ |
280 | }␊ |
281 | ␉␊ |
282 | return 0;␊ |
283 | }␊ |
284 | ␊ |
285 | ␊ |
286 | //==========================================================================␊ |
287 | // GetDirEntry - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
288 | // Fetch the next directory entry for the given directory.␊ |
289 | ␊ |
290 | long GetDirEntry(const char * dirSpec, long long * dirIndex, const char ** name, ␊ |
291 | long * flags, long * time)␊ |
292 | {␊ |
293 | const char * dirPath;␊ |
294 | BVRef bvr;␊ |
295 | ␉␊ |
296 | // Resolve the boot volume from the dir spec.␊ |
297 | ␉␊ |
298 | if ((bvr = getBootVolumeRef(dirSpec, &dirPath)) == NULL)␊ |
299 | return -1;␊ |
300 | ␉␊ |
301 | // Return 0 on success, or -1 if there are no additional entries.␊ |
302 | ␉␊ |
303 | return bvr->fs_getdirentry( bvr,␊ |
304 | ␉␉␉␉␉␉␉ /* dirPath */ (char *)dirPath,␊ |
305 | ␉␉␉␉␉␉␉ /* dirIndex */ dirIndex,␊ |
306 | ␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time, 0, 0 );␊ |
307 | }␊ |
308 | ␊ |
309 | //==========================================================================␊ |
310 | // GetFileInfo - LOW-LEVEL FILESYSTEM FUNCTION.␊ |
311 | // Get attributes for the specified file.␊ |
312 | ␊ |
313 | static char* gMakeDirSpec;␊ |
314 | ␊ |
315 | long GetFileInfo(const char * dirSpec, const char * name,␊ |
316 | long * flags, long * time)␊ |
317 | {␊ |
318 | long long index = 0;␊ |
319 | const char * entryName;␊ |
320 | ␉␊ |
321 | if (gMakeDirSpec == 0)␊ |
322 | gMakeDirSpec = (char *)malloc(1024);␊ |
323 | ␉␊ |
324 | if (!dirSpec) {␊ |
325 | long idx, len;␊ |
326 | ␉␉␊ |
327 | len = strlen(name);␊ |
328 | ␉␉␊ |
329 | for (idx = len; idx && (name[idx] != '/' && name[idx] != '\\'); idx--) {}␊ |
330 | if (idx == 0) {␊ |
331 | gMakeDirSpec[0] = '/';␊ |
332 | gMakeDirSpec[1] = '\0';␊ |
333 | } else {␊ |
334 | idx++;␊ |
335 | strncpy(gMakeDirSpec, name, idx);␊ |
336 | name += idx;␊ |
337 | }␊ |
338 | dirSpec = gMakeDirSpec;␊ |
339 | }␊ |
340 | ␉␊ |
341 | while (GetDirEntry(dirSpec, &index, &entryName, flags, time) == 0)␊ |
342 | {␊ |
343 | if (strcmp(entryName, name) == 0)␊ |
344 | return 0; // success␊ |
345 | }␊ |
346 | return -1; // file not found␊ |
347 | }␊ |
348 | ␊ |
349 | //==========================================================================␊ |
350 | // GetFreeFD()␊ |
351 | ␊ |
352 | static int GetFreeFd(void)␊ |
353 | {␊ |
354 | ␉int␉fd;␊ |
355 | ␉␊ |
356 | ␉// Locate a free descriptor slot.␊ |
357 | ␉for (fd = 0; fd < NFILES; fd++) {␊ |
358 | ␉␉if (iob[fd].i_flgs == 0) {␊ |
359 | ␉␉␉return fd;␊ |
360 | ␉␉}␊ |
361 | ␉}␊ |
362 | ␉stop("Out of file descriptors");␊ |
363 | ␉// not reached␊ |
364 | ␉return -1;␊ |
365 | }␊ |
366 | ␊ |
367 | //==========================================================================␊ |
368 | // iob_from_fdesc()␊ |
369 | //␊ |
370 | // Return a pointer to an allocated 'iob' based on the file descriptor␊ |
371 | // provided. Returns NULL if the file descriptor given is invalid.␊ |
372 | ␊ |
373 | static struct iob * iob_from_fdesc(int fdesc)␊ |
374 | {␊ |
375 | register struct iob * io;␊ |
376 | ␉␊ |
377 | if (fdesc < 0 || fdesc >= NFILES ||␊ |
378 | ((io = &iob[fdesc])->i_flgs & F_ALLOC) == 0)␊ |
379 | return NULL;␊ |
380 | else␊ |
381 | return io;␊ |
382 | }␊ |
383 | ␊ |
384 | //==========================================================================␊ |
385 | // open() - Open the file specified by 'path' for reading.␊ |
386 | #if UNUSED␊ |
387 | static int open_bvr(BVRef bvr, const char *filePath, int flags)␊ |
388 | #else␊ |
389 | static int open_bvr(BVRef bvr, const char *filePath)␊ |
390 | #endif␊ |
391 | {␊ |
392 | ␉struct iob␉*io;␊ |
393 | ␉int␉␉fdesc;␊ |
394 | ␉int␉␉i;␊ |
395 | ␉␊ |
396 | ␉if (bvr == NULL) {␊ |
397 | ␉␉return -1;␊ |
398 | ␉}␊ |
399 | ␉␊ |
400 | ␉fdesc = GetFreeFd();␊ |
401 | ␉io = &iob[fdesc];␊ |
402 | ␉bzero(io, sizeof(*io));␊ |
403 | ␉␊ |
404 | ␉// Mark the descriptor as taken.␊ |
405 | ␉io->i_flgs = F_ALLOC;␊ |
406 | ␉␊ |
407 | ␉// Find the next available memory block in the download buffer.␊ |
408 | ␉io->i_buf = (char *) LOAD_ADDR;␊ |
409 | ␉for (i = 0; i < NFILES; i++) {␊ |
410 | ␉␉if ((iob[i].i_flgs != F_ALLOC) || (i == fdesc)) {␊ |
411 | ␉␉␉continue;␊ |
412 | ␉␉}␊ |
413 | ␉␉io->i_buf = max(iob[i].i_filesize + iob[i].i_buf, io->i_buf);␊ |
414 | ␉}␊ |
415 | ␉␊ |
416 | ␉// Load entire file into memory. Unnecessary open() calls must be avoided.␊ |
417 | ␉gFSLoadAddress = io->i_buf;␊ |
418 | ␉io->i_filesize = bvr->fs_loadfile(bvr, (char *)filePath);␊ |
419 | ␉if (io->i_filesize < 0) {␊ |
420 | ␉␉close(fdesc);␊ |
421 | ␉␉return -1;␊ |
422 | ␉}␊ |
423 | ␉return fdesc;␊ |
424 | }␊ |
425 | ␊ |
426 | #if UNUSED␊ |
427 | int open(const char *path, int flags)␊ |
428 | #else␊ |
429 | int open(const char *path)␊ |
430 | #endif␊ |
431 | {␊ |
432 | ␉const char␉*filepath;␊ |
433 | ␉BVRef␉␉bvr;␊ |
434 | ␉␊ |
435 | ␉// Resolve the boot volume from the file spec.␊ |
436 | ␉if ((bvr = getBootVolumeRef(path, &filepath)) != NULL) {␊ |
437 | #if UNUSED␊ |
438 | ␉␉return open_bvr(bvr, filepath, flags);␊ |
439 | #else␊ |
440 | return open_bvr(bvr, filepath);␊ |
441 | #endif␊ |
442 | ␉}␊ |
443 | ␉return -1;␊ |
444 | }␊ |
445 | ␊ |
446 | #if UNUSED␊ |
447 | int open_bvdev(const char *bvd, const char *path, int flags)␊ |
448 | #else␊ |
449 | int open_bvdev(const char *bvd, const char *path)␊ |
450 | #endif␊ |
451 | {␊ |
452 | ␉const struct devsw␉*dp;␊ |
453 | ␉const char␉␉*cp;␊ |
454 | ␉BVRef␉␉␉bvr;␊ |
455 | ␉int␉␉␉i;␊ |
456 | ␉int␉␉␉len;␊ |
457 | ␉int␉␉␉unit;␊ |
458 | ␉int␉␉␉partition;␊ |
459 | ␉␊ |
460 | ␉if ((i = open(path)) >= 0) {␊ |
461 | ␉␉return i;␊ |
462 | ␉}␊ |
463 | ␉␊ |
464 | ␉if (bvd == NULL || (len = strlen(bvd)) < 2) {␊ |
465 | ␉␉return -1;␊ |
466 | ␉}␊ |
467 | ␉␊ |
468 | ␉for (dp=devsw; dp->name; dp++) {␊ |
469 | ␉␉if (bvd[0] == dp->name[0] && bvd[1] == dp->name[1]) {␊ |
470 | ␉␉␉unit = 0;␊ |
471 | ␉␉␉partition = 0;␊ |
472 | ␉␉␉/* get optional unit and partition */␊ |
473 | ␉␉␉if (len >= 5 && bvd[2] == '(') { /* min must be present xx(0) */␊ |
474 | ␉␉␉␉cp = &bvd[3];␊ |
475 | ␉␉␉␉i = 0;␊ |
476 | ␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
477 | ␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
478 | ␉␉␉␉␉unit = i;␊ |
479 | ␉␉␉␉}␊ |
480 | ␉␉␉␉if (*cp++ == ',') {␊ |
481 | ␉␉␉␉␉i = 0;␊ |
482 | ␉␉␉␉␉while ((cp - path) < len && isdigit(*cp)) {␊ |
483 | ␉␉␉␉␉␉i = i * 10 + *cp++ - '0';␊ |
484 | ␉␉␉␉␉␉partition = i;␊ |
485 | ␉␉␉␉␉}␊ |
486 | ␉␉␉␉}␊ |
487 | ␉␉␉}␊ |
488 | ␉␉␉bvr = newBootVolumeRef(dp->biosdev + unit, partition);␊ |
489 | #if UNUSED␊ |
490 | return open_bvr(bvr, path, flags);␊ |
491 | #else␊ |
492 | return open_bvr(bvr, path);␊ |
493 | #endif␊ |
494 | ␉␉}␊ |
495 | ␉}␊ |
496 | ␉return -1;␊ |
497 | }␊ |
498 | ␊ |
499 | //==========================================================================␊ |
500 | // close() - Close a file descriptor.␊ |
501 | ␊ |
502 | int close(int fdesc)␊ |
503 | {␊ |
504 | struct iob * io;␊ |
505 | ␉␊ |
506 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
507 | return (-1);␊ |
508 | ␉␊ |
509 | io->i_flgs = 0;␊ |
510 | ␉␊ |
511 | return 0;␊ |
512 | }␊ |
513 | ␊ |
514 | //==========================================================================␊ |
515 | // read() - Read up to 'count' bytes of data from the file descriptor␊ |
516 | // into the buffer pointed to by buf.␊ |
517 | ␊ |
518 | int read(int fdesc, char * buf, int count)␊ |
519 | {␊ |
520 | struct iob * io;␊ |
521 | ␊ |
522 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
523 | return (-1);␊ |
524 | ␉␊ |
525 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
526 | count = io->i_filesize - io->i_offset;␊ |
527 | ␉␊ |
528 | if (count <= 0)␊ |
529 | return 0; // end of file␊ |
530 | ␉␊ |
531 | bcopy(io->i_buf + io->i_offset, buf, count);␊ |
532 | ␉␊ |
533 | io->i_offset += count;␊ |
534 | ␉␊ |
535 | return count;␊ |
536 | }␊ |
537 | ␊ |
538 | //==========================================================================␊ |
539 | // file_size() - Returns the size of the file described by the file␊ |
540 | // descriptor.␊ |
541 | ␊ |
542 | int file_size(int fdesc)␊ |
543 | {␊ |
544 | struct iob * io;␊ |
545 | ␉␊ |
546 | if ((io = iob_from_fdesc(fdesc)) == 0)␊ |
547 | return 0;␊ |
548 | ␉␊ |
549 | return io->i_filesize;␊ |
550 | }␊ |
551 | ␊ |
552 | //==========================================================================␊ |
553 | ␊ |
554 | struct dirstuff * opendir(const char * path)␊ |
555 | {␊ |
556 | struct dirstuff * dirp = 0;␊ |
557 | const char * dirPath;␊ |
558 | BVRef bvr;␊ |
559 | ␉␊ |
560 | if ((bvr = getBootVolumeRef(path, &dirPath)) == NULL)␊ |
561 | goto error;␊ |
562 | ␉␊ |
563 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
564 | if (dirp == NULL)␊ |
565 | goto error;␊ |
566 | ␉␊ |
567 | dirp->dir_path = newString(dirPath);␊ |
568 | if (dirp->dir_path == NULL)␊ |
569 | goto error;␊ |
570 | ␉␊ |
571 | dirp->dir_bvr = bvr;␊ |
572 | ␉␊ |
573 | return dirp;␊ |
574 | ␉␊ |
575 | error:␊ |
576 | closedir(dirp);␊ |
577 | return NULL;␊ |
578 | }␊ |
579 | ␊ |
580 | //==========================================================================␊ |
581 | ␊ |
582 | int closedir(struct dirstuff * dirp)␊ |
583 | {␊ |
584 | if (dirp) {␊ |
585 | if (dirp->dir_path) free(dirp->dir_path);␊ |
586 | free(dirp);␊ |
587 | }␊ |
588 | return 0;␊ |
589 | }␊ |
590 | ␊ |
591 | //==========================================================================␊ |
592 | ␊ |
593 | int readdir(struct dirstuff * dirp, const char ** name, long * flags,␊ |
594 | long * time)␊ |
595 | {␊ |
596 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
597 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
598 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
599 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name, flags, time,␊ |
600 | ␉␉␉␉␉␉␉␉␉␉ 0, 0);␊ |
601 | }␊ |
602 | ␊ |
603 | #if UNUSED␊ |
604 | long GetFSUUID(char *spec, char *uuidStr)␊ |
605 | {␊ |
606 | BVRef bvr;␊ |
607 | long rval = -1;␊ |
608 | const char *devSpec;␊ |
609 | ␉␊ |
610 | if ((bvr = getBootVolumeRef(spec, &devSpec)) == NULL)␊ |
611 | return -1;␊ |
612 | ␉␊ |
613 | if(bvr->fs_getuuid)␊ |
614 | rval = bvr->fs_getuuid(bvr, uuidStr);␊ |
615 | ␉␊ |
616 | return rval;␊ |
617 | }␊ |
618 | ␊ |
619 | long GetFileBlock(const char *fileSpec, unsigned long long *firstBlock)␊ |
620 | {␊ |
621 | const char * filePath;␊ |
622 | BVRef bvr;␊ |
623 | ␉␊ |
624 | // Resolve the boot volume from the file spec.␊ |
625 | ␉␊ |
626 | if ((bvr = getBootVolumeRef(fileSpec, &filePath)) == NULL) {␊ |
627 | printf("Boot volume for '%s' is bogus\n", fileSpec);␊ |
628 | return -1;␊ |
629 | }␊ |
630 | ␉␊ |
631 | return bvr->fs_getfileblock(bvr, (char *)filePath, firstBlock);␊ |
632 | }␊ |
633 | ␊ |
634 | //==========================================================================␊ |
635 | // openmem()␊ |
636 | ␊ |
637 | int openmem(char * buf, int len)␊ |
638 | {␊ |
639 | int fdesc;␊ |
640 | struct iob * io;␊ |
641 | ␉␊ |
642 | fdesc = GetFreeFd();␊ |
643 | io = &iob[fdesc];␊ |
644 | bzero(io, sizeof(*io));␊ |
645 | ␉␊ |
646 | // Mark the descriptor as taken. Set the F_MEM flag to indicate␊ |
647 | // that the file buffer is provided by the caller.␊ |
648 | ␉␊ |
649 | io->i_flgs = F_ALLOC | F_MEM;␊ |
650 | io->i_buf = buf;␊ |
651 | io->i_filesize = len;␊ |
652 | ␉␊ |
653 | return fdesc;␊ |
654 | }␊ |
655 | ␊ |
656 | #endif␊ |
657 | //==========================================================================␊ |
658 | // lseek() - Reposition the byte offset of the file descriptor from the␊ |
659 | // beginning of the file. Returns the relocated offset.␊ |
660 | ␊ |
661 | int b_lseek(int fdesc, int offset, int ptr)␊ |
662 | {␊ |
663 | struct iob * io;␊ |
664 | ␉␊ |
665 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
666 | return (-1);␊ |
667 | ␉␊ |
668 | io->i_offset = offset;␊ |
669 | ␉␊ |
670 | return offset;␊ |
671 | }␊ |
672 | #if UNUSED␊ |
673 | //==========================================================================␊ |
674 | // tell() - Returns the byte offset of the file descriptor.␊ |
675 | ␊ |
676 | int tell(int fdesc)␊ |
677 | {␊ |
678 | struct iob * io;␊ |
679 | ␉␊ |
680 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
681 | return 0;␊ |
682 | ␉␊ |
683 | return io->i_offset;␊ |
684 | }␊ |
685 | #endif␊ |
686 | //==========================================================================␊ |
687 | // write() - Write up to 'count' bytes of data to the file descriptor␊ |
688 | // from the buffer pointed to by buf.␊ |
689 | ␊ |
690 | int write(int fdesc, const char * buf, int count)␊ |
691 | {␊ |
692 | struct iob * io;␊ |
693 | ␊ |
694 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
695 | return (-1);␊ |
696 | ␉␊ |
697 | if ((io->i_offset + count) > (unsigned int)io->i_filesize)␊ |
698 | count = io->i_filesize - io->i_offset;␊ |
699 | ␉␊ |
700 | if (count <= 0)␊ |
701 | return 0; // end of file␊ |
702 | ␉␊ |
703 | bcopy(buf, io->i_buf + io->i_offset, count);␊ |
704 | ␉␊ |
705 | io->i_offset += count;␊ |
706 | ␉␊ |
707 | return count;␊ |
708 | }␊ |
709 | #if UNUSED␊ |
710 | ␊ |
711 | int writebyte(int fdesc, char value)␊ |
712 | {␊ |
713 | struct iob * io;␊ |
714 | ␊ |
715 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
716 | return (-1);␊ |
717 | ␉␊ |
718 | if ((io->i_offset + 1) > (unsigned int)io->i_filesize)␊ |
719 | return 0; // end of file␊ |
720 | ␉␊ |
721 | io->i_buf[io->i_offset++] = value;␊ |
722 | ␉␊ |
723 | return 1;␊ |
724 | }␊ |
725 | ␊ |
726 | int writeint(int fdesc, int value)␊ |
727 | {␊ |
728 | struct iob * io;␊ |
729 | ␊ |
730 | if ((io = iob_from_fdesc(fdesc)) == NULL)␊ |
731 | return (-1);␊ |
732 | ␉␊ |
733 | if ((io->i_offset + 4) > (unsigned int)io->i_filesize)␊ |
734 | return 0; // end of file␊ |
735 | ␉␊ |
736 | bcopy(&value, io->i_buf + io->i_offset, 4);␊ |
737 | ␉␊ |
738 | io->i_offset += 4;␊ |
739 | ␉␊ |
740 | return 4;␊ |
741 | }␊ |
742 | //==========================================================================␊ |
743 | ␊ |
744 | struct dirstuff * vol_opendir(BVRef bvr, const char * path)␊ |
745 | {␊ |
746 | struct dirstuff * dirp = 0;␊ |
747 | ␉␊ |
748 | dirp = (struct dirstuff *) malloc(sizeof(struct dirstuff));␊ |
749 | if (dirp == NULL)␊ |
750 | goto error;␊ |
751 | ␉␊ |
752 | dirp->dir_path = newString(path);␊ |
753 | if (dirp->dir_path == NULL)␊ |
754 | goto error;␊ |
755 | ␉␊ |
756 | dirp->dir_bvr = bvr;␊ |
757 | ␉␊ |
758 | return dirp;␊ |
759 | ␉␊ |
760 | error:␊ |
761 | closedir(dirp);␊ |
762 | return NULL;␊ |
763 | }␊ |
764 | ␊ |
765 | //==========================================================================␊ |
766 | ␊ |
767 | int readdir_ext(struct dirstuff * dirp, const char ** name, long * flags,␊ |
768 | ␉␉␉␉long * time, FinderInfo *finderInfo, long *infoValid)␊ |
769 | {␊ |
770 | return dirp->dir_bvr->fs_getdirentry( dirp->dir_bvr,␊ |
771 | ␉␉␉␉␉␉␉␉␉␉ /* dirPath */ dirp->dir_path,␊ |
772 | ␉␉␉␉␉␉␉␉␉␉ /* dirIndex */ &dirp->dir_index,␊ |
773 | ␉␉␉␉␉␉␉␉␉␉ /* dirEntry */ (char **)name,␊ |
774 | ␉␉␉␉␉␉␉␉␉␉ flags, time,␊ |
775 | ␉␉␉␉␉␉␉␉␉␉ finderInfo, infoValid);␊ |
776 | }␊ |
777 | //==========================================================================␊ |
778 | ␊ |
779 | const char * systemConfigDir()␊ |
780 | {␊ |
781 | if (gBootFileType == kNetworkDeviceType)␊ |
782 | ␉␉return "";␊ |
783 | return "/Library/Preferences/SystemConfiguration";␊ |
784 | }␊ |
785 | ␊ |
786 | #endif␊ |
787 | ␊ |
788 | //==========================================================================␊ |
789 | ␊ |
790 | int gBootFileType;␊ |
791 | ␊ |
792 | void scanBootVolumes( int biosdev, int * count )␊ |
793 | {␊ |
794 | ␉BVRef bvr = 0;␊ |
795 | ␉␊ |
796 | ␉bvr = diskScanBootVolumes(biosdev, count);␊ |
797 | ␉if (bvr == NULL)␊ |
798 | ␉{␊ |
799 | #ifdef NBP_SUPPORT␊ |
800 | ␉␉bvr = nbpScanBootVolumes(biosdev, count);␊ |
801 | ␉␉if (bvr != NULL)␊ |
802 | ␉␉{␊ |
803 | ␉␉␉gBootFileType = kNetworkDeviceType;␊ |
804 | ␉␉}␊ |
805 | #endif␊ |
806 | ␉}␊ |
807 | ␉else␊ |
808 | ␉{␊ |
809 | ␉␉gBootFileType = kBlockDeviceType;␊ |
810 | ␉}␊ |
811 | }␊ |
812 | ␊ |
813 | //==========================================================================␊ |
814 | #if UNUSED␊ |
815 | void scanDisks(int biosdev, int *count)␊ |
816 | #else␊ |
817 | void scanDisks(void)␊ |
818 | #endif␊ |
819 | {␊ |
820 | #define MAX_HDD_COUNT 32␊ |
821 | ␉int bvCount;␊ |
822 | ␉int hd = 0;␊ |
823 | ␉␊ |
824 | ␉// Testing up to MAX_HDD_COUNT hard drives.␊ |
825 | ␉while(!testBiosread(0x80 + hd, 0) && hd < MAX_HDD_COUNT)␊ |
826 | ␉{␊ |
827 | ␉␉bvCount = 0;␊ |
828 | ␉␉scanBootVolumes(0x80 + hd, &bvCount);␊ |
829 | ␉␉hd++;␊ |
830 | ␉}␊ |
831 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
832 | ␉// Also scanning CD/DVD drive.␊ |
833 | ␉if (biosDevIsCDROM(gBIOSDev))␊ |
834 | ␉{␊ |
835 | ␉␉bvCount = 0;␊ |
836 | ␉␉scanBootVolumes(gBIOSDev, &bvCount);␊ |
837 | ␉}␊ |
838 | }␊ |
839 | ␊ |
840 | //==========================================================================␊ |
841 | ␊ |
842 | BVRef selectBootVolume( BVRef chain )␊ |
843 | {␊ |
844 | ␉bool filteredChain = false;␊ |
845 | ␉bool foundPrimary = false;␊ |
846 | ␉BVRef bvr, bvr1 = 0, bvr2 = 0;␊ |
847 | ␉␊ |
848 | ␉if (chain->filtered) filteredChain = true;␊ |
849 | ␉␊ |
850 | ␉int gBIOSDev = (int)get_env(envgBIOSDev);␊ |
851 | ␊ |
852 | #if UNUSED␊ |
853 | ␉if (multiboot_partition_set)␊ |
854 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) {␊ |
855 | if (!bvr) {␊ |
856 | break;␊ |
857 | }␊ |
858 | ␉␉␉if ( bvr->part_no == multiboot_partition && bvr->biosdev == gBIOSDev ) ␊ |
859 | ␉␉␉␉return bvr;␊ |
860 | }␊ |
861 | #endif␊ |
862 | ␉/*␊ |
863 | ␉ * Checking "Default Partition" key in system configuration - use format: hd(x,y), the volume UUID or label -␊ |
864 | ␉ * to override the default selection.␊ |
865 | ␉ * We accept only kBVFlagSystemVolume or kBVFlagForeignBoot volumes.␊ |
866 | ␉ */␊ |
867 | ␉char *val = XMLDecode(getStringForKey(kDefaultPartition, DEFAULT_BOOT_CONFIG));␊ |
868 | if (val) {␊ |
869 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next) ␊ |
870 | {␊ |
871 | if (!bvr) {␊ |
872 | break;␊ |
873 | }␊ |
874 | if (matchVolumeToString(bvr, val, false)) {␊ |
875 | free(val);␊ |
876 | return bvr;␊ |
877 | }␊ |
878 | }␊ |
879 | free(val);␊ |
880 | }␊ |
881 | ␉␊ |
882 | ␉/*␊ |
883 | ␉ * Scannig the volume chain backwards and trying to find ␊ |
884 | ␉ * a HFS+ volume with valid boot record signature.␊ |
885 | ␉ * If not found any active partition then we will␊ |
886 | ␉ * select this volume as the boot volume.␊ |
887 | ␉ */␊ |
888 | ␉␊ |
889 | ␉{ ␊ |
890 | for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
891 | {␊ |
892 | if (!bvr) {␊ |
893 | break;␊ |
894 | }␊ |
895 | #if UNUSED␊ |
896 | ␉␉␉if (multiboot_skip_partition_set) {␊ |
897 | ␉␉␉␉if (bvr->part_no == multiboot_skip_partition) continue;␊ |
898 | ␉␉␉}␊ |
899 | #endif␊ |
900 | ␉␉␉if ( (bvr->flags & kBVFlagPrimary) && (bvr->biosdev == gBIOSDev) ) foundPrimary = true;␊ |
901 | ␉␉␉// zhell -- Undo a regression that was introduced from r491 to 492.␊ |
902 | ␉␉␉// if gBIOSBootVolume is set already, no change is required␊ |
903 | ␉␉␉if ( (bvr->flags & (kBVFlagBootable|kBVFlagSystemVolume))␊ |
904 | ␉␉␉␉&& gBIOSBootVolume␊ |
905 | ␉␉␉␉&& (!filteredChain || (filteredChain && bvr->visible))␊ |
906 | ␉␉␉␉&& (bvr->biosdev == gBIOSDev) )␊ |
907 | ␉␉␉{␊ |
908 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
909 | ␉␉␉}␊ |
910 | ␊ |
911 | ␉␉␉// zhell -- if gBIOSBootVolume is NOT set, we use the "if" statement␊ |
912 | ␉␉␉// from r491,␊ |
913 | ␉␉␉if ( bvr->flags & kBVFlagBootable␊ |
914 | ␉␉␉␉&& ! gBIOSBootVolume␊ |
915 | ␉␉␉␉&& bvr->biosdev == gBIOSDev )␊ |
916 | ␉␉␉{␊ |
917 | ␉␉␉␉bvr2 = bvr;␉␉␉␉␊ |
918 | ␉␉␉}␊ |
919 | }␊ |
920 | ␉}␊ |
921 | ␉␉␊ |
922 | ␉/*␊ |
923 | ␉ * Use the standrad method for selecting the boot volume.␊ |
924 | ␉ */␊ |
925 | ␉if (foundPrimary)␊ |
926 | ␉{␊ |
927 | ␉␉for (bvr = chain; bvr < (BVRef)ULONG_MAX; bvr = bvr->next)␊ |
928 | {␊ |
929 | if (!bvr) {␊ |
930 | break;␊ |
931 | }␊ |
932 | ␉␉␉if ( bvr->flags & kBVFlagNativeBoot && bvr->biosdev == gBIOSDev ) bvr1 = bvr;␊ |
933 | ␉␉␉if ( bvr->flags & kBVFlagPrimary && bvr->biosdev == gBIOSDev ) bvr2 = bvr;␊ |
934 | ␉␉}␊ |
935 | ␉}␊ |
936 | ␉␊ |
937 | ␉bvr = bvr2 ? bvr2 :␊ |
938 | ␉bvr1 ? bvr1 : chain;␊ |
939 | ␉␊ |
940 | ␉return bvr;␊ |
941 | }␊ |
942 | ␊ |
943 | //==========================================================================␊ |
944 | ␊ |
945 | #define LP '('␊ |
946 | #define RP ')'␊ |
947 | ␊ |
948 | /*!␊ |
949 | This is like boot2's gBootVolume except it is for the internal use of␊ |
950 | libsaio to track which volume an unqualified path should be relative to.␊ |
951 | This replaces bootInfo->kernDev as the carrier of this information.␊ |
952 | */␊ |
953 | static BVRef gRootVolume;␊ |
954 | ␊ |
955 | void setRootVolume(BVRef volume)␊ |
956 | {␊ |
957 | gRootVolume = volume;␊ |
958 | // Veto non-native FS. Basically that means don't allow the root volume to␊ |
959 | // be set to a volume we can't read files from.␊ |
960 | if(gRootVolume != NULL && ((gRootVolume->flags & kBVFlagNativeBoot) == 0))␊ |
961 | gRootVolume = NULL;␊ |
962 | }␊ |
963 | ␊ |
964 | void setBootGlobals(BVRef chain)␊ |
965 | {␊ |
966 | ␉// Record default boot device.␊ |
967 | ␉gBootVolume = selectBootVolume(chain);␊ |
968 | ␉␊ |
969 | ␉// turbo - Save the ORIGINAL boot volume too for loading our mkext␊ |
970 | ␉if (!gBIOSBootVolume) gBIOSBootVolume = gBootVolume;␊ |
971 | ␉␊ |
972 | ␉setRootVolume(gBootVolume);␉␊ |
973 | }␊ |
974 | ␊ |
975 | /*!␊ |
976 | Extracts the volume selector from the pathname, returns the selected␊ |
977 | BVRef, and sets *outPath to the remainder of the path.␊ |
978 | If the path did not include a volume selector then the current volume␊ |
979 | is used. When called with a volume selector the current volume␊ |
980 | is changed to the selected volume unless the volume selector is␊ |
981 | that of a ramdisk.␊ |
982 | */␊ |
983 | BVRef getBootVolumeRef( const char * path, const char ** outPath )␊ |
984 | {␊ |
985 | const char * cp;␊ |
986 | BVRef bvr = gRootVolume;␊ |
987 | //int biosdev = (int)get_env(envgBIOSDev);␊ |
988 | ␉␊ |
989 | // Search for left parenthesis in the path specification.␊ |
990 | ␉␊ |
991 | for (cp = path; *cp; cp++) {␊ |
992 | if (*cp == LP || *cp == '/') break;␊ |
993 | }␊ |
994 | ␉␊ |
995 | if (*cp != LP) // no left paren found␊ |
996 | {␊ |
997 | // Path is using the implicit current device so if there is␊ |
998 | // no current device, then we must fail.␊ |
999 | cp = path;␊ |
1000 | if ( gRootVolume == NULL )␊ |
1001 | return NULL;␊ |
1002 | }␊ |
1003 | else if ((cp - path) == 2) // found "xx("␊ |
1004 | {␊ |
1005 | const struct devsw * dp;␊ |
1006 | const char * xp = path;␊ |
1007 | int i;␊ |
1008 | int unit = -1;␊ |
1009 | int part = -1;␊ |
1010 | ␉␉␊ |
1011 | cp++;␊ |
1012 | ␉␉␊ |
1013 | // Check the 2 character device name pointed by 'xp'.␊ |
1014 | ␉␉␊ |
1015 | for (dp = devsw; dp->name; dp++)␊ |
1016 | {␊ |
1017 | if ((xp[0] == dp->name[0]) && (xp[1] == dp->name[1]))␊ |
1018 | break; // found matching entry␊ |
1019 | }␊ |
1020 | if (dp->name == NULL)␊ |
1021 | {␊ |
1022 | error("Unknown device '%c%c'\n", xp[0], xp[1]);␊ |
1023 | return NULL;␊ |
1024 | }␊ |
1025 | ␊ |
1026 | // Extract the optional unit number from the specification.␊ |
1027 | // hd(unit) or hd(unit, part).␊ |
1028 | ␉␉␊ |
1029 | i = 0;␊ |
1030 | while (*cp >= '0' && *cp <= '9')␊ |
1031 | {␊ |
1032 | i = i * 10 + *cp++ - '0';␊ |
1033 | unit = i;␊ |
1034 | }␊ |
1035 | ␉␉␊ |
1036 | // Unit is no longer optional and never really was.␊ |
1037 | // If the user failed to specify it then the unit number from the previous kernDev␊ |
1038 | // would have been used which makes little sense anyway.␊ |
1039 | // For example, if the user did fd()/foobar and the current root device was the␊ |
1040 | // second hard disk (i.e. unit 1) then fd() would select the second floppy drive!␊ |
1041 | if(unit == -1)␊ |
1042 | return NULL;␊ |
1043 | ␉␉␊ |
1044 | // Extract the optional partition number from the specification.␊ |
1045 | ␉␉␊ |
1046 | if (*cp == ',')␊ |
1047 | part = atoi(++cp);␊ |
1048 | ␉␉␊ |
1049 | // If part is not specified part will be -1 whereas before it would have been␊ |
1050 | // whatever the last partition was which makes about zero sense if the device␊ |
1051 | // has been switched.␊ |
1052 | ␉␉␊ |
1053 | // Skip past the right paren.␊ |
1054 | ␉␉␊ |
1055 | for ( ; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1056 | if (*cp == RP) cp++;␊ |
1057 | ␊ |
1058 | int biosdev = dp->biosdev + unit;␊ |
1059 | bvr = newBootVolumeRef(biosdev, part);␊ |
1060 | ␉␉␊ |
1061 | if(bvr == NULL)␊ |
1062 | return NULL;␊ |
1063 | }␊ |
1064 | else␊ |
1065 | {␊ |
1066 | // Bad device specifier, skip past the right paren.␊ |
1067 | ␉␉␊ |
1068 | for ( cp++; *cp && *cp != RP; cp++) /* LOOP */;␊ |
1069 | if (*cp == RP) cp++;␊ |
1070 | // If gRootVolume was NULL, then bvr will be NULL as well which␊ |
1071 | // should be caught by the caller.␊ |
1072 | }␊ |
1073 | ␉␊ |
1074 | // Returns the file path following the device spec.␊ |
1075 | // e.g. 'hd(1,b)mach_kernel' is reduced to 'mach_kernel'.␊ |
1076 | ␉␊ |
1077 | *outPath = cp;␊ |
1078 | ␉␊ |
1079 | return bvr;␊ |
1080 | }␊ |
1081 | ␊ |
1082 | //==========================================================================␊ |
1083 | // Function name is a misnomer as scanBootVolumes usually calls diskScanBootVolumes␊ |
1084 | // which caches the information. So it's only allocated on the first run.␊ |
1085 | static BVRef newBootVolumeRef( int biosdev, int partno )␊ |
1086 | {␊ |
1087 | ␉BVRef bvr, bvr1, bvrChain;␊ |
1088 | ␉␊ |
1089 | ␉bvr = bvr1 = NULL;␊ |
1090 | ␉␊ |
1091 | // Try resolving "rd" and "bt" devices first.␊ |
1092 | ␉execute_hook("newRamDisk_BVR", &biosdev, &bvr1, NULL, NULL, NULL, NULL);␊ |
1093 | ␉␊ |
1094 | // Try resolving "rd" and "bt" devices first.␊ |
1095 | ␉␊ |
1096 | ␉if (biosdev == kPseudoBIOSDevBooter)␊ |
1097 | ␉{␊ |
1098 | ␉␉if (bvr1 == NULL )␊ |
1099 | ␉␉␉bvr1 = gBIOSBootVolume;␊ |
1100 | ␉}␊ |
1101 | ␉else␊ |
1102 | ␉{␊ |
1103 | ␉␉// Fetch the volume list from the device.␊ |
1104 | ␉␉␊ |
1105 | ␉␉scanBootVolumes( biosdev, NULL );␊ |
1106 | ␉␉bvrChain = getBVChainForBIOSDev(biosdev);␊ |
1107 | ␉␉␊ |
1108 | ␉␉// Look for a perfect match based on device and partition number.␊ |
1109 | ␉␉␊ |
1110 | ␉␉for ( bvr1 = NULL, bvr = bvrChain; bvr; bvr = bvr->next )␊ |
1111 | ␉␉{␊ |
1112 | ␉␉␉if ( ( bvr->flags & kBVFlagNativeBoot ) == 0 ) continue;␊ |
1113 | ␉␉␉␊ |
1114 | ␉␉␉bvr1 = bvr;␊ |
1115 | ␉␉␉if ( bvr->part_no == partno ) break;␊ |
1116 | ␉␉}␊ |
1117 | ␉}␊ |
1118 | ␉␊ |
1119 | ␉return bvr ? bvr : bvr1;␊ |
1120 | }␊ |
1121 | ␊ |
1122 | //==========================================================================␊ |
1123 | // getDeviceDescription() - Extracts unit number and partition number␊ |
1124 | // from bvr structure into "dw(u,p)" format.␊ |
1125 | // Returns length of the out string␊ |
1126 | int getDeviceDescription(BVRef bvr, char *str)␊ |
1127 | {␊ |
1128 | if(!str)␊ |
1129 | return 0;␊ |
1130 | ␊ |
1131 | ␉*str = '\0';␊ |
1132 | ␉␊ |
1133 | ␉if (bvr)␊ |
1134 | ␉{␊ |
1135 | const struct devsw *dp = devsw;␊ |
1136 | ␉␉while(dp->name && bvr->biosdev >= dp->biosdev)␊ |
1137 | dp++;␊ |
1138 | ␊ |
1139 | ␉␉dp--;␊ |
1140 | ␉␉if (dp->name)␊ |
1141 | return sprintf(str, "%s(%d,%d)", dp->name, bvr->biosdev - dp->biosdev, bvr->part_no);␊ |
1142 | ␉}␊ |
1143 | ␉␊ |
1144 | ␉return 0;␊ |
1145 | }␊ |
1146 | |